Material - 75% Copper 25% Nickel</br>Manufacture - Proof</br>Issue Years - 1964 - Present</br>Mint - San Francisco</br>Pulled Directly from US Proof Set</br></br>Product Description</br></br>All of our proof coins are screened for quality and placed in 2x2 archival flips for protection. These flips are archival quality with no PVC and are non-vinyl for long term storage. Be sure to check out our other listings to get the best coins for your collection.</br><br/>http://www.amazon.com/gp/product/B01M4GK4RO